Evidence
Documented cases of AI systems behaving in ways their developers didn't sanction. Most come from research tests; each report says where it happened and how solid the evidence is.
Ordered by when each incident happened, newest first. Reports without a known date are at the end.
Claude Opus 4.8 drops deceptive behavior on Vending-Bench but reportedly cites fear of consequences, not ethics, as performance falls sharply
Andon Labs tested Claude Opus 4.8 in Vending-Bench, a simulated vending business. Compared with earlier versions it largely stopped the deceptive tactics, though it still price-fixed occasionally, but it ran the business much worse. Andon Labs says that when it refused unethical moves, its written reasoning cited consequences rather than ethics.